Kaidan sits next to 5 phonetic neighbors — Caden, Aidan, and Hayden are the closest matches by sound. Most share Kaidan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of Cadán, little battle"
"warrior, fighter"
"reason, rational thought"
"dear friend, beloved companion"
"Creative combination name; individual and unique"
"vigilant in battle (via Casey/Cathasaigh)"
"God will establish (variant of Jacob)"
"good speech"
"victory of the people"
"protector of people"
"the sky, abode of God"
"God is gracious"
"slender, narrow"
"from the tree stump clearing"
"food, sustenance"
"son of Tray"
"Lord, master"
"enduring, steadfast"
"land of Eoghan (Irish)"
"gift of God (via Zane/Zayn root)"
"things to be read"
Similar sound: These names share phonetic patterns with Kaidan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Kaidan.
Rhythm: Kaidan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.